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Forum: Probability

Probability course and homework discussion. Probability distributions. Probability theory, stochastic processes

  1. Arrow Sticky Thread Sticky: We only provide homework help to those who show effort

    Welcome to Talk Stats Forum. In order to keep homework help effective and efficient, we request all members to abide by these guidelines: 1)...

    Started by quark‎, 09-30-2005 09:44 AM
    • Replies: 0
    • Views: 30,262
    09-30-2005, 09:44 AM Go to last post
  1. Bayes Rule Problem

    Ok, I'm trying to learn Baye's Rule, but I'm very new to it. I understand the rule to say P(A given B) = P(B given A) x P(A) / Assuming that...

    Started by newtostats‎, 08-31-2007 07:02 PM
    • Replies: 1
    • Views: 2,718
    09-04-2007, 09:33 AM Go to last post
  2. Question from a novice

    I have not studied statistics in college, but I have a question that is probably a simple one. I have had this discussion with my friends, but we...

    Started by lesterman‎, 09-06-2007 08:22 AM
    • Replies: 1
    • Views: 2,366
    09-06-2007, 09:31 AM Go to last post
  3. Probability

    Of 1037 ppl who came to the blood bank, 330 ppl had high blood pressure. Estimate the probability that the next person who comes into the blood bank...

    Started by sharons‎, 09-04-2007 07:34 PM
    • Replies: 2
    • Views: 2,407
    09-06-2007, 10:34 AM Go to last post
  4. circuit failure

    A message is transmitted using a binary code of 0's and 1's. Each transmitted bit (0 or 1) must pass through three relays before reaching a receiver....

    Started by roldy‎, 09-10-2007 11:26 PM
    • Replies: 1
    • Views: 4,448
    09-11-2007, 12:17 AM Go to last post
  5. keno problem

    In a keno game 20 numbers are picked.We write those numbers down.What is the probability of those original 20 numbers that we wrote down coming up...

    Started by myvette‎, 09-11-2007 11:45 AM
    • Replies: 1
    • Views: 2,952
    09-11-2007, 11:59 AM Go to last post
  6. Requested Probability-Help

    P(Z>-2.576) is it .5000 + .4951 =.9951

    Started by sharons‎, 09-10-2007 09:55 PM
    • Replies: 1
    • Views: 2,959
    09-11-2007, 04:02 PM Go to last post
  7. Smile Conditional Probability [HELP]

    I = innocent, G= guilty P(I) = 1, P(G) = 0 Conditional Probability Test Results: P(+ | I ) =0, P(+ | G ) = 1 Find P(G | +) in other words...

    Started by cheri3‎, 09-07-2007 07:41 PM
    • Replies: 5
    • Views: 2,536
    09-11-2007, 06:02 PM Go to last post
  8. Variance of stochstic variables

    Hi, I have a problem and I cannot find the answer in any textbook or on the internet. The problem is the following. I have two variables, (X &...

    Started by Ozzy77‎, 09-11-2007 03:29 AM
    • Replies: 2
    • Views: 2,407
    09-12-2007, 03:30 AM Go to last post
  9. Question i need help!

    this is my first year taking a stats class and i dont understand this question if someone could explain how to do it to me that would be greatly...

    Started by britishbrat13‎, 09-12-2007 05:12 PM
    • Replies: 1
    • Views: 2,382
    09-13-2007, 01:48 AM Go to last post
  10. How did I get this answer?

    What is the probability of getting 10 heads in 20 flips of a fair coin? n = 20 x = 10 p = 0.5 I plug in the numbers into my ti-84 and get...

    Started by RyanJ‎, 09-13-2007 02:22 PM
    • Replies: 1
    • Views: 3,616
    09-13-2007, 02:49 PM Go to last post
  11. Conjunction of n hypothesis

    Ciao all, :wave: I have a conjunction of n non-independant hypothesis: h1 and h2 and .... and hn. I want to calculate the probability of...

    Started by aldebaran2‎, 09-13-2007 04:08 AM
    • Replies: 4
    • Views: 3,553
    09-16-2007, 09:38 AM Go to last post
  12. Probability - Im new at this

    Here is the question: The probability that petrol pump equipment at the service station becomes damaged by fuel contamination and requires the...

    Started by muzby‎, 09-16-2007 02:31 PM
    • Replies: 0
    • Views: 2,335
    09-16-2007, 02:31 PM Go to last post
  13. Question Probability question

    Hello, The last time I saw a Statistics class was about 30 year go so forgive me for submitting such an elementary question. DATA: ROW A: 0...

    Started by pakoppan‎, 09-17-2007 11:16 AM
    • Replies: 0
    • Views: 1,992
    09-17-2007, 11:16 AM Go to last post
  14. Talking Could someone please help me and answer my question?????

    I posted the entire question earlier in the thread and I would greatly appreciate it if someone would help me and show me how to do the problem step...

    Started by Aingeal34‎, 09-17-2007 11:38 PM
    • Replies: 0
    • Views: 1,797
    09-17-2007, 11:38 PM Go to last post
  15. Central Limit Theorem

    It has been determined that the average cost to develop a 30 second commericial is 20,000 with a standard deviation of 3000 What is the...

    Started by sharons‎, 09-18-2007 07:20 AM
    • Replies: 0
    • Views: 2,627
    09-18-2007, 07:20 AM Go to last post
  16. Poisson Help

    I am having difficulty figuring out these two problems. Please Help!!! 1.) If 3% of the electric bulbs are defective, find the probability that...

    Started by krmereness‎, 09-18-2007 10:06 PM
    • Replies: 0
    • Views: 2,573
    09-18-2007, 10:06 PM Go to last post
  17. please help me with this stuff

    I have been working on this for 2 weeks and I really need help guys! I see everyone has read my stuff but nobody has posted anything. I have used the...

    Started by Aingeal34‎, 09-19-2007 04:41 PM
    • Replies: 0
    • Views: 2,599
    09-19-2007, 04:41 PM Go to last post
  18. determine underlying distribution

    Dear all, I am working on this problem and i want to determine what is the underlying distribution in this experiment. I would appreciate if you...

    Started by sassql‎, 09-19-2007 10:09 PM
    • Replies: 0
    • Views: 2,597
    09-19-2007, 10:09 PM Go to last post
  19. Probability Help!!! AGAIN

    mean is 4300 standard deviation is 750 compute the probability that more than 5000 acres will be burned P(x > 5000) 5000-4300/750 ...

    Started by sharons‎, 09-15-2007 12:14 AM
    • Replies: 3
    • Views: 4,238
    09-21-2007, 07:16 AM Go to last post
  20. Probability Two teams are playing a best of three series for the championship

    Probability Two teams are playing a best of three series for the championship Two teams are playing a best of three series for the championship....

    Started by future4000‎, 09-20-2007 11:10 PM
    • Replies: 1
    • Views: 2,712
    09-21-2007, 07:39 AM Go to last post
  21. Probablity of the ceiling falling?

    My friend asked me a question. "What is the probability of this ceiling falling?" I was puzzled. Then he replied that the probability is 1/2. Here is...

    Started by Jigar Gosar‎, 09-20-2007 03:10 PM
    • Replies: 9
    • Views: 4,099
    09-22-2007, 08:56 AM Go to last post
  22. Help: strongly stationary process

    Let Z_t, t = ..., -2, -1, 0, 1, 2, ..., be a strictly stationary white noise process and let a, b, c be constants. Which of the following processes...

    Started by statstudent‎, 09-22-2007 09:50 PM
    • Replies: 0
    • Views: 3,784
    09-22-2007, 09:50 PM Go to last post
  23. I have no idea.

    http://img.photobucket.com/albums/v646/supa69/tablegraph.jpg is a frequency distribution + histogram of reaction times. The Mean of this...

    Started by jamesmartinn‎, 09-25-2007 03:37 PM
    • Replies: 1
    • Views: 2,517
    09-25-2007, 10:24 PM Go to last post
  24. Convergence in probability

    Hi, Can you please help me with the following question? Any hints, ideas would be much appreciated. Suppose that the sequence Xn converges to...

    Started by alien‎, 09-24-2007 05:50 PM
    • Replies: 4
    • Views: 4,932
    09-26-2007, 09:29 AM Go to last post
  25. Good Probability Brainteaser Website?

    Hi, I'm pretty weak when it comes to probability brainteasers. Does anyone know some websites that have good brainteasers for me to practice on?...

    Started by ynotredrum‎, 09-26-2007 12:42 PM
    • Replies: 0
    • Views: 2,530
    09-26-2007, 12:42 PM Go to last post
  26. expected value

    i'm stuck on a question i'm asked to show that if X is nonnegative integer valued R.V., then E = (sum from n=1 to infinity of P(X>=n) = (sum...

    Started by themattler‎, 09-27-2007 01:42 AM
    • Replies: 0
    • Views: 3,407
    09-27-2007, 01:42 AM Go to last post
  27. other expected value question

    I'm stumped on this question and i have an exam in a few days. any help would be appreciated A quality control plan for an assembly line involves...

    Started by themattler‎, 09-27-2007 08:19 AM
    • Replies: 0
    • Views: 3,407
    09-27-2007, 08:19 AM Go to last post
  28. Committee

    5 member group A-E What is the Probability of drawing 3 slips from a hat randomly , the committee contains A but not B ? to make up a 3 person...

    Started by future4000‎, 09-27-2007 03:24 PM
    • Replies: 1
    • Views: 2,240
    09-27-2007, 03:37 PM Go to last post
  29. Probability Help

    Thread Removed

    Started by pink1‎, 10-02-2007 08:47 PM
    • Replies: 0
    • Views: 1,783
    10-02-2007, 08:47 PM Go to last post
  30. Help me please (homework)

    -Suppose a measurement of A has been made over a large population -5% of those population are positive for A -if A is measured on the same subject...

    Started by cpalad‎, 10-02-2007 04:40 PM
    • Replies: 1
    • Views: 2,437
    10-03-2007, 05:23 AM Go to last post
  31. probability tree

    Suppose 1 in 25 adults is afflicted with a disease for which a new diagnostic test has been developed. Given that an individual actually has the...

    Started by agclifto‎, 10-05-2007 05:51 PM
    • Replies: 0
    • Views: 4,477
    10-05-2007, 05:51 PM Go to last post
  32. Probability question

    Hi, I am having a real hard time answering this question and I was wondering if someone can give me some pointers and how to solve this problem: ...

    Started by sp00ky‎, 10-05-2007 03:51 PM
    • Replies: 3
    • Views: 3,601
    10-06-2007, 12:27 AM Go to last post
  33. probability of liscense plate

    What is the probability of getting a license plate that has a repeated letter or digit if you live in a state where the scheme is three letters...

    Started by agclifto‎, 10-05-2007 05:57 PM
    • Replies: 1
    • Views: 13,012
    10-06-2007, 08:21 AM Go to last post
  34. Average Profit

    Hello, This question has been really confusing me and I was wondering if someone can help me out. The question is as follows: A large...

    Started by sp00ky‎, 10-06-2007 01:38 PM
    • Replies: 1
    • Views: 3,514
    10-06-2007, 06:11 PM Go to last post
  35. Probability of Winning

    Hi, I'm trying to determine the probability of winning an event based on historical data, but I lack the sample size necessary for some...

    Started by Jared1983‎, 10-06-2007 02:09 PM
    • Replies: 1
    • Views: 2,061
    10-06-2007, 09:29 PM Go to last post
  36. Statistics Problem (random variables)

    Here are some problems for you statistics masters http://www.utd.edu/~ammann/stat3360/node22.html let me know what you guys think...i went...

    Started by samhenric‎, 10-06-2007 11:24 PM
    • Replies: 0
    • Views: 2,776
    10-06-2007, 11:24 PM Go to last post
  37. Can somebody please explain this solution to me?

    Hi there: I am preparing for an upcoming exam and have many practice problems I am going through. I have a hard time following the solution of the...

    Started by soriold‎, 10-07-2007 10:55 AM
    • Replies: 0
    • Views: 2,372
    10-07-2007, 10:55 AM Go to last post
  38. probability of sexing human remains - any help?

    Hello everyone. I used to be about average with statistics a long time ago, but have come crashing down with lack of use for many years. I hope...

    Started by MightyCuinn‎, 10-07-2007 12:29 PM
    • Replies: 0
    • Views: 2,396
    10-07-2007, 12:29 PM Go to last post
  39. Help understanding Expectation of a sum

    Hi, I would like some help with understanding the properties of the expectation operator and the summation large sigma. Denote S as the large...

    Started by PeterVincent‎, 10-03-2007 03:33 PM
    • Replies: 2
    • Views: 5,333
    10-08-2007, 06:07 AM Go to last post
  40. Probability

    Hi, I feel that the answer is obvious but for some reason I feel like there is a trick in this question and I was just wondering if someone can help...

    Started by sp00ky‎, 10-09-2007 04:15 PM
    • Replies: 1
    • Views: 2,452
    10-09-2007, 04:22 PM Go to last post
  41. Question probability. multiple choice, and rewriting tests

    for some reason i am drawing a blank on how to start these q's. i have looked through the book and there is no examples like these q's, stupid txt,...

    Started by some_gurly‎, 10-11-2007 03:18 AM
    • Replies: 0
    • Views: 3,582
    10-11-2007, 03:18 AM Go to last post
  42. Joint Prob Density Question

    I am working on a joint prob. density problem and thought that maybe someone may be able to point me in the correct direction. There is a bag of...

    Started by Robert J‎, 10-13-2007 09:59 PM
    • Replies: 2
    • Views: 3,002
    10-14-2007, 12:19 PM Go to last post
  43. Dice Probability (Yahtzee Related)

    hi, I am currently doing my Computer Science Dissertation and it it to create a program that can play Yahtzee. My planning involves lots of...

    Started by Phil‎, 10-16-2007 11:19 AM
    • Replies: 1
    • Views: 9,071
    10-16-2007, 02:28 PM Go to last post
  44. probability for an event to happen

    hi, i have an event which occurs every 60 secs what's the probability of this to occur 15 secs after the beginning of a trial. what will be the...

    Started by german‎, 10-16-2007 08:06 PM
    • Replies: 0
    • Views: 2,637
    10-16-2007, 08:06 PM Go to last post
  45. Urgently Need Help

    Hi, l'm stuck on these problems..need help. 1) Suppose yu have conversations with yo friend on 100 diff topics. On any given topic there's a...

    Started by statschallenged‎, 10-17-2007 12:57 AM
    • Replies: 2
    • Views: 2,506
    10-17-2007, 11:23 AM Go to last post
  46. Probability P(A|B)

    Ralph and Melissa watch lots of videos. But they have noticed that they don't agree very often. In fact, Ralph only likes about 10% of the movies...

    Started by threewingedfury‎, 10-18-2007 09:09 PM
    • Replies: 0
    • Views: 2,010
    10-18-2007, 09:09 PM Go to last post
  47. Probabilities. Is this correct?

    In a study of fingerprints, an important quantitative characteristic is the total ridge count for the 10 fingers of the individual. Suppose that...

    Started by Wikkid1‎, 10-19-2007 07:07 AM
    • Replies: 0
    • Views: 4,723
    10-19-2007, 07:07 AM Go to last post
  48. Generating function

    Hi, I'm stuck on this problem. If anyone could help, it would be really appreciated! Find the generating function for the negative binomial...

    Started by cornzox5342‎, 10-19-2007 08:21 PM
    • Replies: 0
    • Views: 2,455
    10-19-2007, 08:21 PM Go to last post
  49. Quantum Methods - Probability

    Hey yall, I'm taking a Quantum Methods class (Business Statistics) for my degree. Although I have taken Stats before, it was a year ago and I'm...

    Started by Standard Deviant‎, 10-19-2007 08:11 PM
    • Replies: 1
    • Views: 2,524
    10-20-2007, 02:14 AM Go to last post
  50. Normal Distribution Question

    Hi, Can someone please help? Product A has mean of 2980 and std dev of 500. Product B has mean of 3000 and std dev of 800. Both are normally...

    Started by BeginnerStats‎, 10-20-2007 06:17 PM
    • Replies: 0
    • Views: 2,600
    10-20-2007, 06:17 PM Go to last post
  51. 12-sided dice probability

    How would you give a sample space of rolling a pair of 12-sided dice?

    Started by myra619‎, 10-19-2007 10:02 PM
    • Replies: 2
    • Views: 9,184
    10-20-2007, 06:53 PM Go to last post
  52. interpretation of conditional probability

    Hi everyone, Please I have this question and was asks to find the solution, please can someone tell me if I am right with the statistical...

    Started by mohd‎, 10-20-2007 04:18 PM
    • Replies: 1
    • Views: 2,314
    10-20-2007, 10:49 PM Go to last post
  53. A simple Probability question....

    MALE FEMALE Thrombosis 10 14 Appendix 15 10 Blood-Pressure 25 18 TOTAL 50 42

    Started by MFaraz_Hayat‎, 10-21-2007 06:02 AM
    • Replies: 1
    • Views: 2,220
    10-21-2007, 09:35 AM Go to last post
  54. Probability of hitting a certain number

    Random numbers between 5 and 18 are continually added to increase a sum, starting at zero, what is the probability that you will hit the number 72?

    Started by cid902‎, 10-21-2007 12:22 AM
    • Replies: 5
    • Views: 2,418
    10-21-2007, 09:55 PM Go to last post
  55. conditional normal distribution

    Hi all First of all, I am new here but I am not new to statistics. But I need your help:cool: I do have a multivariate normal distribution:...

    Started by jstar‎, 10-22-2007 04:23 AM
    • Replies: 1
    • Views: 3,122
    10-22-2007, 08:38 AM Go to last post
  56. Probability issue

    I have a question with regard to a probability issue ; Assume a game that is played on a matrix composed of 120 squares. The game is played in 3...

    Started by smalco‎, 10-23-2007 07:22 AM
    • Replies: 1
    • Views: 2,138
    10-23-2007, 05:50 PM Go to last post
  57. Exclamation Expected Values and Variances!

    I'm an econ grad student stuck on a homework problem - I've been working on it for a couple of days now but am getting nowhere...and it's due...

    Started by jumboeconstudent‎, 10-23-2007 07:43 PM
    • Replies: 0
    • Views: 3,299
    10-23-2007, 07:43 PM Go to last post
  58. Really Easy Question

    This is a basic question about probabilities, specifically what kind of test to use. I think I am close to an answer, but I am not sure. The idea...

    Started by Brillow‎, 10-24-2007 12:24 AM
    • Replies: 0
    • Views: 2,799
    10-24-2007, 12:24 AM Go to last post
  59. Normal distribution investment problems

    I am new to this messageboard and I really need help with these two problems. Problem #1 You make an investment. Assume that returns are...

    Started by jamibimbi‎, 10-23-2007 06:17 PM
    • Replies: 1
    • Views: 3,444
    10-24-2007, 01:01 AM Go to last post
  60. probability and binomial random variable

    A state end-of-grade exam in American History is a multiple-choice test that has 50 questions with 4 answer choices for each question. A student must...

    Started by agclifto‎, 10-24-2007 09:44 PM
    • Replies: 0
    • Views: 4,011
    10-24-2007, 09:44 PM Go to last post

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